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From: "Victor A. Sudakov" <vas@vas.tomsk.su>
Message-Id: <199706161616.AAA03879@vas.tomsk.su>
Subject: Re: NT4 ISP
To: toj@gorilla.net (Tom Jackson)
Date: Tue, 17 Jun 1997 00:16:36 +0800 (TSD)
Cc: questions@freebsd.org
In-Reply-To: <19970615064922.52723@peeper.my.domain> from "Tom Jackson" at "Jun 15, 97 06:49:22 am"
Organization: Tomsk Region Education Department
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Tom Jackson wrote:
> On Sat, Jun 14, 1997 at 11:08:56PM +0800, Victor A. Sudakov wrote:
> > Tom Jackson wrote:
> > 
> > > I have dynamic assigned address. My /etc/hosts file has only the loopback
> > > address, 127.0.0.1, and nothing else (I have no ethernet card). If I use
> > > anything there with my hostname, my isp will try to use that address and
> > > the connection will fail. 
> > 
> > Why should he try to use that address? And how is he going to know about it,
> > anyway?
> > 
> 
> Well for one reason, that is the default standard everyone starts with. You
> only muck it up when you start modifying the file :)

Sorry, I did not understand this phrase. I mean if you assign another IP
address to your lo0 interface, the ISP will not know about this and this
will cause no problems at all.

> 
> > > This is something I wish somebody would clearup.
> > 
> > I also have a dynamically assigned address. However, I have in my /etc/hosts
> > file:
> > 
> > 127.0.0.1		localhost 
> > 192.168.1.1	vas.tomsk.su vas
> 
> I think maybe you have an ethernet card, yes?

No, I have none.

> 
> > 
> > And in my /etc/rc.local:
> > 
> > /sbin/ifconfig lo0 inet 192.168.1.1 alias
> > 
> 
> Everything I've seen posted recommends against using this assignment. I'm

What is the reason of recommending against this assignment? What is wrong
with it? Note the "alias" parameter I use. Thus, lo0 has two addresses.

> glad it works for you though.
> 
> > It works fine, I can ping vas.tomsk.su even if I am offline. It does not
> > prevent me from using ppp because 192.168.1.1 is associated with lo0 and has
> > nothing to do with tun0.
> > 
> 
> I'm not sure I understand this. I thought the 127 address was the loopback
> address.

Certainly. In my case, the lo0 interface has two addresses:

127.0.0.1	localhost
192.168.1.1	vas.tomsk.su vas

I can ping both 127.0.0.1 and 192.168.1.1

-- 
Victor Sudakov
http://www.tomsk.su/r/persons/vas.htm